Hi! I've got an 8 month male (He's still technically a puppy, and he certainly thinks he's a tiny little one) and currently my wife and I are in a discussion about if he can be a full time outdoor dog or not. My wife would like him to be fully outdoor as most Japanese houses simply do not let big dogs into the house. I'm a bit more hesitant, especially at night. Our temps drop to around -7C (19f) though -12 (10f) isn't unheard of. Now, Charlie has a fully insulated, two room, raised dog house with straw bedding and his favorite blanket. It's out of the direct wind and with the connecting tunnel to his kennel, doesn't get drafts in. I've been trying to find out any advice if this would be warm enough, if we need a heater, or just better to state when it reaches X degrees, he needs to come in to sleep. Any ideas/advice/numbers? How cold is too cold to stay out full time? Thanks!